Need help iwth harnesses; transfer case, 7 pin...

[nimrod.sixty9]

Hi all,
Mom got a 2004 Tahoe from someone who must have been a nut case as the harnesses for the 7 pin, post O2 sensor, and transfer case have been ripped out.

I already have the 7 pin plastic connector off of Amazon. It's a generic one so I need a wiring diagram.

For the TC, it's the motor side. I imagine I could probably use a harness from someone who has a bad one. LMK if Im wrong here. Much appreciate if anyone out there has a bad motor and can help me out.

Is the post O2 required. I can replace it later, just want to know if I can pass on it for now.

Also there are a pair of wires hanging down behind each headlight. Could these be from fogs?

TIA

 

[Fless]

The (NVG246?) TC connector -- it's the one with 8 positions but 7 pins (wires)? I forget which end has the pins...

EDIT: this one (sorry about the big pic)?

 

[Fless]

@******.sixty9, here's how my reman AC Delco encoder is wired. Not sure if the wire colors match up to your encoder motor, but it's worth a try. I couldn't decide on a color for the "tan-yellow" one, it seems to be a hybrid, more tan than yellow. The ones that don't say small on them are larger gauge wires.

 

[nimrod.sixty9]

@Fless Thank you for the info!
It was the 7 pin for the trailer/camper hookup that I needed the diagram for.
As for the encoder motor (thanks for reminding me of the name) I need the harness for the motor side. Reaching out to see if someone has a bad motor laying around that I could get the harness from. As for the truck side harness, it is full if mud and debris but it is intact. I need to get back under and confirm what case is there.

 

[Fless]

For the wires on the connector that plugs into the back of this type of 7-blade?

 

[nimrod.sixty9]

For the wires on the connector that plugs into the back of this type of 7-blade?

View attachment 223680

Thats the one!

 

[Fless]

It just so happens that I have my hitch off to paint, so the connector is readily accessible. See if these pics of the backside of the connector help:

 

[nimrod.sixty9]

Thank you! Unfortunately this doesn't show me where pin 1 is.
Being in a circle they could all be off a pin by the same amount.

Now I have even worse problems. Now it wont stay running ugh

 

[Rocket Man]

Thank you! Unfortunately this doesn't show me where pin 1 is.
Being in a circle they could all be off a pin by the same amount.

Now I have even worse problems. Now it wont stay running ugh

You can look at the part that protrudes out from the plug and go from there. Not sure what it’s called,the thing that makes sure the plug goes into the hole correctly. Locator lug? The thing that sticks out by the blue and green wires. If you can’t figure it out from those pics you shouldn’t be working on it IMO.

 

[nimrod.sixty9]

Excuse me for not noticing... something that tells me nothing.
That could be top, bottom, or any direction for that matter.
Mine is aftermarket and completely different.